<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="../bootstrap-3.3.7/dist/css/bootstrap.css">
</head>

<body>
    <!-- Single button -->
    <!-- btn-default btn-success  -->
    <div class="btn-group">
        <button type="button" class="btn btn-success btn-lg  dropdown-toggle" data-toggle="dropdown" aria-haspopup="true"
            aria-expanded="false">
            Action <span class="caret"></span>
        </button>
        <ul class="dropdown-menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">Separated link</a></li>
        </ul>
    </div>
</body>

</html>